Colliers | Arkansas is listing this four-floor, 45,000 square foot, downtown office condo for sale and for lease. 521 President Clinton Avenue in Little Rock, Arkansas is a mixed-use residential and office building in one of the best places to be in downtown. The building’s visibility from I-30 is nearly unmatched and the amenities in the immediate vicinity, including the River Market, are some of the most popular in the city.